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Factorise : 27 + 125 a^3 + 135a + 225 a^2

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Factorise :  27 + 125 a3 + 135a + 225 a2

(a) (3 + 5a)(3 + 5a)(3 - 5a)

(b) (3 - 5a)(3 - 5a)(3 + 5a)

(c) (3 + 5a)(3 + 5a)(3 + 5a)

(d) (3 - 5a)(3 - 5a)(3 - 5a)

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(c) (3 + 5a)(3 + 5a)(3 + 5a)

27 + 125a3 + 135a + 225a2

= (3)3 + (5a)3 + 3 x 32 x 5a + 3 x 3 x (5a)2

= (3 + 5a)3

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